Surgical instrument



FIG. 1 is an elevational view of the surgical instrument;

FIG. 2 is an enlarged view of the basket portion of the instrument, as viewed along line 2--2 of FIG. 1, showing the basket expended; and

FIG. 3 is a sectional view of the basket as viewed along the line 3--3 of FIG. 2. 

The ornamental design for a surgical instrument, as shown. 